Collect all 30 Elephant Statues to unlock new costumes for all four characters.

Mystical Ninja history

Have the Game Boy Advance game Kessakusen! Ganbare Goemon 1+2 also inserted in the GBA slot. At select locations throughout the game, various characters from the Game Boy Advance game will appear and tell you things about Goemon's past.

Space-Manbo mini-game

Have the Game Boy Advance game Kessakusen! Ganbare Goemon 1+2 also inserted in the GBA slot. Space-Manbo will now be unlocked at the mini-game menu.

Goemon New Age Shutsudou! reference

In the second town's underground prison, New Aged Goemon can be found occupying the second jail cell for his "crimes against the Goemon franchise."